60 



Journal of Entomolop,- and Zoolog\' 









^^:si?^ 



Fig. II. Cerebral ganglia. X9. Sunset clam. 



Fig. 12. Pedal ganglion. X9. Sunset clam. 



Fig. 13. Visceral ganglion from tlie side. (a) ("onncctivc branch, (b) dorsal 

 hrancli, (c) gill branch, (d) branch to posterior adductor muscle, (e) mantle branch, 

 (f) matitlc and ventral siphon branch, tg) small mantle branch ?, (h) mantle and 

 dorsal siphon branch. Sunset clam. 



Figs. 14 and 15. Othtr views of the visceral ganglion, lettering as in Fig. 3. X9. 



